For tahiti and Pitcairn it seems still 9.7 is fastest 
Very good speedup on Polaris!, 20-30h/s per card or even more
Very good speedup on Polaris!, 20-30h/s per card or even more
Hmm, in my tests v11 is a bit faster for both Tahiti and Pitcairn, or at least the same. May be you use not optimal settings.
still no support for old HD 7700/7800 cards 
(don't say anything about 9.7 version please, which doesn't have magical "-allcoins" option)
(don't say anything about 9.7 version please, which doesn't have magical "-allcoins" option)
Sorry, I don't not support very old cards anymore.
My experience is the same as restless. On my two gigabyte 270OC, 9.7 is still the best.
11.0
-h 448 -dmem 1 (11.0 default) - OpenCL hang.
-h 512 -dmem 0 - 840h/s
-h 256 -dmem 1 - 810h/s
9.7
-h 512 (default) - 855-860h/s